Определить тип придаточного предложения. (в скобках после предложения написать: Defining clauses или Non-defining clauses)

Расставить запятые, там, где нужно

Percy Island which is covered in tropical jungle has golden beaches.  (d)

The room, which he gave me, had a marvelous view.  (n-d)

The place, where we spent most of our time, was the swimming pool.  (n-d)

My grandparents who are in their sixties are going on a cruise.  (d)

A guide is a person who takes people around places of interest.  (d)

Who is the woman that you were talking to? I'm going to stay in Athens where my brother has a flat.  (d)